/*
http://www.JSON.org/json2.js
2008-03-24

Public Domain.

NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.

See http://www.JSON.org/js.html
    
modified by Rick Strahl to support MS AJAX style
date formats
*/

if (!this.JSON2) {

	// Create a JSON object only if one does not already exist. We create the
	// object in a closure to avoid global variables.

	JSON2 = function() {

		function f(n) {    // Format integers to have at least two digits.
			return n < 10 ? '0' + n : n;
		}

		//*** RAS - removed date .toJSON for MS Ajax - string double encodes otherwise

		//        Date.prototype.toJSON = function () {

		//// Eventually, this method will be based on the date.toISOString method.
		//              
		//              // RAS MODIFIED: Return MS AJAX Style dates
		//              var xx = '"\/Date(' + this.getTime() + ')\/"';                                    
		//              return xx;
		////            return this.getUTCFullYear()   + '-' +
		////                 f(this.getUTCMonth() + 1) + '-' +
		////                 f(this.getUTCDate())      + 'T' +
		////                 f(this.getUTCHours())     + ':' +
		////                 f(this.getUTCMinutes())   + ':' +
		////                 f(this.getUTCSeconds())   + 'Z';
		//        };


		var escapeable = /["\\\x00-\x1f\x7f-\x9f]/g,
            gap,
            indent,
            meta = {    // table of character substitutions
            	'\b': '\\b',
            	'\t': '\\t',
            	'\n': '\\n',
            	'\f': '\\f',
            	'\r': '\\r',
            	'"': '\\"',
            	'\\': '\\\\'
            },
            rep;


		function quote(string) {

			// If the string contains no control characters, no quote characters, and no
			// backslash characters, then we can safely slap some quotes around it.
			// Otherwise we must also replace the offending characters with safe escape
			// sequences.

			return escapeable.test(string) ?
                '"' + string.replace(escapeable, function(a) {
                	var c = meta[a];
                	if (typeof c === 'string') {
                		return c;
                	}
                	c = a.charCodeAt();
                	return '\\u00' + Math.floor(c / 16).toString(16) +
                                               (c % 16).toString(16);
                }) + '"' :
                '"' + string + '"';
		}


		function str(key, holder) {

			// Produce a string from holder[key].

			var i,          // The loop counter.
                k,          // The member key.
                v,          // The member value.
                length,
                mind = gap,
                partial,
                value = holder[key];

			// If the value has a toJSON method, call it to obtain a replacement value.

			if (value && typeof value === 'object' &&
                    typeof value.toJSON === 'function') {
				value = value.toJSON(key);
			}

			// If we were called with a replacer function, then call the replacer to
			// obtain a replacement value.

			if (typeof rep === 'function') {
				value = rep.call(holder, key, value);
			}

			// What happens next depends on the value's type.

			switch (typeof value) {

				case 'string':
					return quote(value);

				case 'number':

					// JSON numbers must be finite. Encode non-finite numbers as null.

					return isFinite(value) ? String(value) : 'null';

				case 'boolean':
				case 'null':

					// If the value is a boolean or null, convert it to a string. Note:
					// typeof null does not produce 'null'. The case is included here in
					// the remote chance that this gets fixed someday.

					return String(value);

					// If the type is 'object', we might be dealing with an object or an array or
					// null.

				case 'object':

					// Due to a specification blunder in ECMAScript, typeof null is 'object',
					// so watch out for that case.

					if (!value) {
						return 'null';
					}

					// *** RAS - MS AJAX style date encoding
					if (value.toUTCString) {
						var xx = '"\\/Date(' + value.getTime() + ')\\/"';
						return xx;
					}

					// Make an array to hold the partial results of stringifying this object value.

					gap += indent;
					partial = [];

					// If the object has a dontEnum length property, we'll treat it as an array.

					if (typeof value.length === 'number' &&
                        !(value.propertyIsEnumerable('length'))) {

						// The object is an array. Stringify every element. Use null as a placeholder
						// for non-JSON values.

						length = value.length;
						for (i = 0; i < length; i += 1) {
							partial[i] = str(i, value) || 'null';
						}

						// Join all of the elements together, separated with commas, and wrap them in
						// brackets.

						v = partial.length === 0 ? '[]' :
                        gap ? '[\n' + gap + partial.join(',\n' + gap) +
                                  '\n' + mind + ']' :
                              '[' + partial.join(',') + ']';
						gap = mind;
						return v;
					}

					// If the replacer is an array, use it to select the members to be stringified.

					if (typeof rep === 'object') {
						length = rep.length;
						for (i = 0; i < length; i += 1) {
							k = rep[i];
							if (typeof k === 'string') {
								v = str(k, value, rep);
								if (v) {
									partial.push(quote(k) + (gap ? ': ' : ':') + v);
								}
							}
						}
					} else {

						// Otherwise, iterate through all of the keys in the object.

						for (k in value) {
							v = str(k, value, rep);
							if (v) {
								partial.push(quote(k) + (gap ? ': ' : ':') + v);
							}
						}
					}

					// Join all of the member texts together, separated with commas,
					// and wrap them in braces.

					v = partial.length === 0 ? '{}' :
                    gap ? '{\n' + gap + partial.join(',\n' + gap) +
                              '\n' + mind + '}' :
                          '{' + partial.join(',') + '}';
					gap = mind;
					return v;
			}
		}


		// Return the JSON object containing the stringify, parse, and quote methods.

		return {
			stringify: function(value, replacer, space) {

				// The stringify method takes a value and an optional replacer, and an optional
				// space parameter, and returns a JSON text. The replacer can be a function
				// that can replace values, or an array of strings that will select the keys.
				// A default replacer method can be provided. Use of the space parameter can
				// produce text that is more easily readable.

				var i;
				gap = '';
				indent = '';
				if (space) {

					// If the space parameter is a number, make an indent string containing that
					// many spaces.

					if (typeof space === 'number') {
						for (i = 0; i < space; i += 1) {
							indent += ' ';
						}

						// If the space parameter is a string, it will be used as the indent string.

					} else if (typeof space === 'string') {
						indent = space;
					}
				}

				// If there is no replacer parameter, use the default replacer.

				if (!replacer) {
					rep = function(key, value) {
						if (!Object.hasOwnProperty.call(this, key)) {
							return undefined;
						}
						return value;
					};

					// The replacer can be a function or an array. Otherwise, throw an error.

				} else if (typeof replacer === 'function' ||
                        (typeof replacer === 'object' &&
                         typeof replacer.length === 'number')) {
					rep = replacer;
				} else {
					throw new Error('JSON.stringify');
				}

				// Make a fake root object containing our value under the key of ''.
				// Return the result of stringifying the value.

				return str('', { '': value });
			},


			parse: function(text, reviver) {

				// The parse method takes a text and an optional reviver function, and returns
				// a JavaScript value if the text is a valid JSON text.
				var j;

				function walk(holder, key) {

					// The walk method is used to recursively walk the resulting structure so
					// that modifications can be made.

					var k, v, value = holder[key];
					if (value && typeof value === 'object') {
						for (k in value) {
							if (Object.hasOwnProperty.call(value, k)) {
								v = walk(value, k);
								if (v !== undefined) {
									value[k] = v;
								} else {
									delete value[k];
								}
							}
						}
					}
					return reviver.call(holder, key, value);
				}


				// Parsing happens in three stages. In the first stage, we run the text against
				// regular expressions that look for non-JSON patterns. We are especially
				// concerned with '()' and 'new' because they can cause invocation, and '='
				// because it can cause mutation. But just to be safe, we want to reject all
				// unexpected forms.

				// We split the first stage into 4 regexp operations in order to work around
				// crippling inefficiencies in IE's and Safari's regexp engines. First we
				// replace all backslash pairs with '@' (a non-JSON character). Second, we
				// replace all simple value tokens with ']' characters. Third, we delete all
				// open brackets that follow a colon or comma or that begin the text. Finally,
				// we look to see that the remaining characters are only whitespace or ']' or
				// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.

				if (/^[\],:{}\s]*$/.test(text.replace(/\\["\\\/bfnrtu]/g, '@').
replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {

					// In the second stage we use the eval function to compile the text into a
					// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
					// in JavaScript: it can begin a block or an object literal. We wrap the text
					// in parens to eliminate the ambiguity.


					// *** RAS Update:  Fix up Dates: ISO and MS AJAX format support
					//var regEx = /(\"\d{4}-\d{2}-\d{2}T\d{2}:\d{2}.*?\")|(\"\\*\/Date\(.*?\)\\*\/")/g;
					var regEx = /(\"\d{4}-\d{2}-\d{2}T\d{2}:\d{2}.*?\")|(\"\\*\/Date\(.*?\)\\*\/")/g;
					text = text.replace(regEx, this.regExDate);
					// *** End RAS Update

					j = eval('(' + text + ')');

					// In the optional third stage, we recursively walk the new structure, passing
					// each name/value pair to a reviver function for possible transformation.

					return typeof reviver === 'function' ?
                        walk({ '': j }, '') : j;
				}

				// If the text is not JSON parseable, then a  is thrown.
				throw new SyntaxError('JSON.parse');
			},
			// *** RAS Update: RegEx handler for dates ISO and MS AJAX style
			regExDate: function(str, p1, p2, offset, s) {
				str = str.substring(1).replace('"', '');
				var date = str;

				// MS Ajax date: /Date(19834141)/
				if (/\/Date(.*)\//.test(str)) {
					str = str.match(/Date\((.*?)\)/)[1];
					date = "new Date(" + parseInt(str) + ")";
				}
				else { // ISO Date 2007-12-31T23:59:59Z                                     
					var matches = str.split(/[-,:,T,Z]/);
					matches[1] = (parseInt(matches[1], 0) - 1).toString();
					date = "new Date(Date.UTC(" + matches.join(",") + "))";
				}
				return date;
			},

			quote: quote
		};
	} ();
}
